Not a few people who wish for Bitcoin to crash. Those who wish for Bitcoin to crash usually come from the buyers just like what is said by franky1.
But sometimes it's possible comes from a small group of other coin developers, who hope that their coin can grow, because all this time bitcoin has consistently dominated the crypto market, and may be considered a major rival.
they wish for it to be at a discount when they get paid their wage to buy in cheap.. then they wish for it to jump in price the very same week to cash back out because they owe rent and need groceries..
then they repeat the same thing over and over again
remember for every bunch of people wanting a discount day(drop), theres also people wanting profit day(rise)
then they repeat the same thing over and over again
remember for every bunch of people wanting a discount day(drop), theres also people wanting profit day(rise)
Why does it look like most people wish for Bitcoin to crash? 
But sometimes it's possible comes from a small group of other coin developers, who hope that their coin can grow, because all this time bitcoin has consistently dominated the crypto market, and may be considered a major rival.